I have checked and found that if a multi question is not shown to respondent then we are getting all Zero for that question in SPSS data file.Ideally we should get all blanks in this case.Following are screen shots.

Issue reported
bugs.limesurvey.org/view.php?id=8147

Just noticed the same behaviour with SPSS export for 2.06 and earlier (solved allready for 2.5+).
LOL , it appeared to be a very old headache for our researchers working with SPSS export files.

If topic is still relevant, here's the fast way to solve it for LS 2.06+ and earlier: modify 1 line in /application/helpers/export_helper.php row
from to
Regards

ddrmoscow wrote: modify 1 line in /application/helpers/export_helper.php row
from

Code:

} else

to

Code:

} elseif(isset($row[$fieldno]))

row 187

mabye a bug report or even a pull request would be interesting.